Attributes at the selected pixel
the upstream catchment those values describe
the divide around it
L∥, the axial length
L⊥ and the bounding box
L∥ = max ∥p − v∥, p ∈ ∂U(v)This is version 1.0, an earlier release, kept for the papers and datasets that cite it. The current release is version 1.1. When the paper is accepted, 1.1 takes its place here; this page and the Zenodo record stay, marked as superseded.
Shape measures like perimeter or elongation normally have to be computed on demand: delineate the catchment of the point you care about, walk its boundary, then do the arithmetic. Here all sixteen — eight terrain statistics and eight shape metrics — are already computed and stored at the pixel, wherever at least 10 km² drains through it, so getting them is a raster read. That is only possible because every pixel stores a depth-first interval, and both the catchment and its divide follow from those two numbers — which is what makes doing it at every pixel, rather than at a fixed list of outlets, affordable at all.
L∥ = max ∥p − v∥, p ∈ ∂U(v)Point your phone’s camera at the QR code, then tap the link that appears.
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